RFC 3754 (rfc3754) - Page 1 of 34

IP Multicast in Differentiated Services (DS) Networks

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Network Working Group                                           R. Bless
Request for Comments: 3754                            Univ. of Karlsruhe
Category: Informational                                        K. Wehrle
                                                      Univ. of Tuebingen
                                                              April 2004


         IP Multicast in Differentiated Services (DS) Networks

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).  All Rights Reserved.

Abstract

   This document discusses the problems of IP Multicast use in
   Differentiated Services (DS) networks, expanding on the discussion in
   RFC 2475 ("An Architecture of Differentiated Services").  It also
   suggests possible solutions to these problems, describes a potential
   implementation model, and presents simulation results.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
       1.1.  Management of Differentiated Services. . . . . . . . . .  2
   2.  Problems of IP Multicast in DS Domains . . . . . . . . . . . .  3
       2.1.  Neglected Reservation Subtree Problem (NRS Problem). . .  4
       2.2.  Heterogeneous Multicast Groups . . . . . . . . . . . . . 12
       2.3.  Dynamics of Any-Source Multicast . . . . . . . . . . . . 13
   3.  Solutions for Enabling IP-Multicast in Differentiated
       Services Networks. . . . . . . . . . . . . . . . . . . . . . . 13
       3.1.  Solution for the NRS Problem . . . . . . . . . . . . . . 13
       3.2.  Solution for Supporting Heterogeneous Multicast Groups . 15
       3.3.  Solution for Any-Source Multicast. . . . . . . . . . . . 16
   4.  Scalability Considerations . . . . . . . . . . . . . . . . . . 16
   5.  Deployment Considerations. . . . . . . . . . . . . . . . . . . 17
   6.  Security Considerations. . . . . . . . . . . . . . . . . . . . 18
   7.  Implementation Model Example . . . . . . . . . . . . . . . . . 18
   8.  Proof of the Neglected Reservation Subtree Problem . . . . . . 19
       8.1.  Implementation of the Proposed Solution. . . . . . . . . 20
       8.2.  Test Environment and Execution . . . . . . . . . . . . . 21
   9.  Simulative Study of the NRS Problem and Limited Effort PHB . . 23



Bless & Wehrle               Informational
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